求个正则表达式。高手进！
<img src= "https://ab.cctv.com/img/6eKv0uVZFelwVRyZ39YCdtVBtuM3Y5Fn_wpPCNEStwxIyINeGhYOuOsjJoFFoZyW16JwpyBhyAup.jpg " width= "290 " height= "80 " alt= "my photo " border= "0 ">

如何把src后的图片地址给匹配了？

[解决办法]
try

string yourStr = ....................;
Match m = Regex.Match(yourStr, @ " <img[^> ]*src=([ ' " "])?(? <img> [^ ' " "\s> ]*)\1[^> ]*> ", RegexOptions.IgnoreCase);
if (m.Success)
{
MessageBox.Show(m.Groups[ "img "].Value);
}

[解决办法]
<img[^> ]*src\s?=\s?([ ' " "])?[^ ' " "\s> ]*?(? <img> [^ ' " "\s> /]*)\1[^> ]*>
[解决办法]
@ " <img[^> ]*src=([ ' " "])?[^ ' " "\s> ]*?(? <img> [^ ' " "\s> /]*)\1[^> ]*> ",
这个地方是不是效率不高啊？
[^> ]*
贪婪搜索，先搜索到> 表示匹配失败，然后返回来看src...这些，然后选择的让出自己匹配。为什么不用.*?呢
[解决办法]
@ " <img[^> ]*(\\s+)src(\\s*)=(\\s*)(? <quo> (\ "| ')?)([^> /]+/)+(? <img> [^/]+)\\k <quo> [^> ]*> ",
[解决办法]
前面那个 @不应该有的 ,贴了别人的忘记删掉了,哈